#pragma
//不让他拷贝
class nocopy
{
public:
    nocopy(){}
    nocopy(const nocopy &)=delete;
    const nocopy&operator= (const nocopy &)=delete;
};
#pragma once

// class nocopy
// {
// public:
//     nocopy(){}
//     nocopy(const nocopy &) = delete;
//     const nocopy&operator=(const nocopy &) = delete;
// };